I probably was not quite clear. Vitry became a marshal for killing Concini. Richelieu was too young and not connected well enough to became a commander of the company of the
Garde du corps du roi by 1617 and definitely was not a close confidant of Louis XIII since he was a dauphin. So Richelieu could not replace him in
this specific action and would not become marshal. The future events related to Vitry are not important: he was not critically important in the French domestic and foreign policy and 1637-43 he spent in Bastille.
In OTL Richelieu was making his career first by showing his abilities at the Estates General as the most eloquent representative of the 1st Estate and then by faithfully serving the
Queen-Mother's favourite,
Concino Concini, the most powerful minister in the kingdom. In 1616, Richelieu was made Secretary of State, and was given responsibility for foreign affairs and later was returned by the King as a person capable of reasoning with his mother. As a lay person he simply would not be anywhere close to the inner circle and would not have the same type of an influence to launch his career. He would be a junior officer and not a very rich or very aristocratic one. Who and why would ask his opinion on the affairs of state? Who and why would appoint him to any command position? Even if he distinguishes himself in the wars against the Huguenots to a degree that allows him to be appointed captain of the royal musketeers, this is a dead end appointment with no impact on the state affairs.